Warp-drawing machine



L f r June 22 1926.

I 1,589,587 H. D, coLMAN WAR? 'DRAWING MACH-INE Filed Jan. e, 1925v 51 sheets-sheet i I; l je jmzew June 22 1926."

H. D. coLMAN WARP DRAWING MACHINE 4 lSheets-Sheet 2 Filed Jan. 8, 1925 jzvenaz': Hwmrd. Caiman 47 M @A @4m .lune z2 1926'. 1,589,587

' H. D. COLMAN WRP DRAWING MACHINE Filed Jan'. 8, 1925 4 Sheets-Shut 5 f1] M M was@ June 22 1926., 1,589,587 H. D. COLMAN A WARP DRAWING MACHINE Filed Jan. 8, 1925 4 Sheets-Sheet 4 f1 w l @www Patented `lune 22, 1926i.

UNITED srAras isisasei raar erica.

:HOWARD D. connais, or noonronn, internets, assrenoa iro Banana-.comun CoM- PANY, or nocrrroan, rriiruois, n coaronariou or ILLINOIS.

Wanrsnnnwrne MACHINE.

Application tiled .Tanuary 8, 1923. Serial No. 611,214.

Warp-drawing machinesl oi' the type comi monly used comprise supports tor 'the warp., the harnesses and the reed, and a carriage arranged to travel longitudinally ot the warp, harnesses and reed, on vwhich carriage is mounted mechanisms for selecting warp threads, positioning heddle eyes and reed dents, andl drawing selected threads through the proper heddle eyes and reed dents.. nasmuch as a warp-drawing machine should be capable o Operating upon harnesses and reeds ot varying sley, it has been necessary to provide means Yfor adjusting the rate. 0i movement of: the mechanism carriage correspond as nearly as practicable with the sley of the harnesses or the reed. ln practice, such control ol the `teed oit the. mechanism Carriage has heretofore been obtained by means ot change-speed gearing, as shown, tor example, in Patent No. 1,383,195, dated June 28, 1921, or by the use ot a variablespeed transmission as shown in Patent No. 1,090,401, dated March 17, 1914.-.l A carriage feed of the character shown in the patents just mentioned must he adjusted whenever' a change occurs in the sley ot the reed or the harnesses to vbe operated upon; and it the operator i'ailsto adjust the carriage leed mechanism so as to give a close approximation to the ideal Irate. of carriage movement the .mechanisms on the mecljianismV carriage which operate `on the reed and theharnesses attempt to displace the reed and the. harnesses beyond the space allotted to them in the machine and thus cause trouble.

The Hathaway and Lea Patent No. 1,482,- 648 granted Feb. 5, 1924;, discloses a means 'for automatically controlling the carriage ife'edmechanism through the medium of the reed. f n

The object of the present invention is to provide improved means whereby to obviate the necessity of manually adjusting the car,- riage feed mechanism, andto obtain an automatic regulation of the `feed ot the mechanism carriage to correspond with the sley yofthe harnesses or the reed.

In the accompanyingv drawings, Figure 1 is a ragmental rear view of the lett-hand end oit a warp-drawing machine, that is to say, the end at which the mechanism carriage starts, the carriage feedmeohanism heing shown as arranged to be controlled by the reed. The View is taken in the plane of vfor upon the. bed ot the lllvCllHef line 1-1 of Fig. 2. Fig. 2 is a ragmental lett-hand end view of theY machine.' Figs. 3, 4r and 5 are fragmental views ot the, reed showing the reed opener Yin engagement therewith. Fig. 6 is avew upon an en-Y larged scale of the mechanism shown in Fig,

between the Vdrive rod and the. teed pawl arm. Fig. 8 is a fragn'iental rear view of the left-hand end of themachine, showing the carriage feed mechanism arranged to he controlled hy one oft the harnesses. v

In the accompanying drawings, 1 denotes the hed or" the machine, 2 being-g the upright,

`trarne member at the left-hand end off vthe machine.

The mechanism carriage 3 is 1arranged to travel upon ways provided thereopener l is supported upon the mechanism carriage in the usual or any sui-table way. Thereedopener may he of any preferred character, that herein shown being substantially similar tothe. one disclosed inpatientV BT08715530, dated November 19,1907. The reed opener is somewhat in the orinotfa. single-thread screw which hy its rotation .successively opens the dents Aot" the reed by spreading the ksplits s uiicientlyto permit the needle to pass through ,the dent.`

The .reed R may be supported the warp-drawing machine in any suitable man` ner, that herein shown being essentially the samey as the construction fully disciosed in Patent No. 1,169,087, dated January 18, 1916. The reed is supported by means of clamps 5 attached to a bar 6 which is pron vided with rollers 7 resting upon. a rail 8 forming part ofthe `stationary framework of the machine.

The' mechanism for positioning the heddle eyes in proper succession for the passage of the needle comprises a worm 9 for each harness,v which worm may he constructed F illustrates a yield-ing connection A, reed and arranged as shown in Patent No. 1,383.-l

Cil

The means herein shown for driving the mechanism carriage 3 longitudinally of the machine comprises a feed screw 12 engaging a nut 13 on the mechanism carriage. rihe means for transmitting power to the feed screw 12 may be controlled by either the reed as shown in Fig. 1 or by one of' the harnesses, as shown in Fig. 8.

Referring now to Fig. 2, it will he seen that a main drive shaft 14 carries at its left-hand end a crank 15 to which is connected a rod 16. rlhe forward end of the connecting rod 16 is attached to an arm 17, whereby rotation of the crank 15 imparts oscillation to the arm 17. rThe arm 17 is pivotally mounted upon a .stub shaft 18 supported by a bracket 19 attached to the outer side of the upright frame member 2. A ratchet dog 2O is pivot-ally mounted upon the arm 17 and is held in engagement with a ratchet wheel 21 by means of a helically coiled expansive spring 22 f Fig. 6). The ratchet wheel 21 is secured to the side of a spur gear wheel 23 which is rotatably mounted upon the stub shaft 18. rifhe gear wheel 23 meshes with a pinion 24 which is fixed to the feed screw 12.

Means is provided for preventing the arm 17 from swinging far enough to allow the ratchet dog to snap behind a tooth of the ratchet wheel 21 when the relation of the drawing-in mechanism to the'datum element (that is to say, the reed cr the harness) is such that the mechanism carriage need not be moved. nasmuch as the connecting rod 16 moves through an unvarying cycle, it is necessary to provide a yielding connection between said rod and the arm 17. One form of yielding connection is illustrated in Fig. 7 wherein it will be seen that the connecting rod 16 is provided with an elongated opening 25 for a pivot pin 26 on the arm 17. A block 27, slidably mounted in the opening 25, is held against the pivot pin 26 by means of a spring 28 and a plunger 29, the spring 28 being strong enough to keep the pivot pin 26 at the forward end of the elongated opening 25 except when the oscillation of the arm 17 is interfered with.

The means for controlling the oscillation of the arm 17 comprises an arm 30 rigid with the arm 17 The arm 3() is provided with a hardened steel plate 31 adapted to engage the lower end of a vertically-reciprocated bar 32. The lower end of the bar is guided in a block 33 which is secured to the bracket 19. The upper end of the bar 32 is pivoted to an arnr 34 which is pivotally supported in a bracket 35 secured to the end frame member 2. Rigid with the arm 34 is a crank arm 36 to which is connected one end of a link 37. The other end of said link is connected to the bar 6.

A helically coiled contractile spring 38 attached at one end to the bar 32 and at its other to the bracket 35, serves to counterbalance the weight of the bar 32 and the bell crank 34 36, so that a light push or pull imparted to the link 37 is sufficient to raise or lower the bar 32. The extent of movement of the bar 32 is limited by engagement of the crank arm 34 with stop pins 39 on the bracket 35.

in operation, if the mechanism carriage 3 travels toward the left (as viewed in Fig. 1) faster than the reed opener 4 screws its way through the reed, the reed will be carried toward the left with the mechanism carriage, thereby causing the bar 32 to be lowered into position to limit the oscillation of the arm 30, thus preventing the ratchet dog 20 from taking a tooth of the ratchet wheel 21, and thereby causing suspenion of the travel of the mechanism carriage. The continuing operation of the reed opener 4 then causes the reed to travel toward the right (as viewed in Fig. 1) whereby the bar 32 is raised out of the path of movement of the arm 30, and movement is again imparted to the mechanism carriage. In this way, the travel of the mechanism carriage is interrupted from time to time as may be necessary to adapt the feed movement of the carriage to the sley of the particular reed being operated upon.

Referring now to Fig. 8: When the travel of the mechanism carriage 3 is to be regulated by one of the harnesses, a bar replaces the link 37, one end of the bar 40 being pivoted to the crank arm 36 and the opposite end portion being slidably supported in a stirrup 41, depending from the rail 8. A collar 42 is adjustably secured to the bar 40 in position to abut against the adjacent end of the upper harness shaft H. lhen using a harness to control the carriage feed mechanism in the manner herein shown, gravity is depended upon to hold the collar 42 against the harness shaft H', the spring 38 being of suchy tension that this result may be attained. It will be seen that if the mechanism carriage 3 travels faster than the harness worm 9 screws its way through the harness, the harness will be carried to the left (as viewed in Fig. 8) with the mechanism carriage, the collar 42 will follow the harness shaft H', and the bar 32 will descend into position to interfere with the oscillation of the arm 30. Consequently, the ratchet dog 20 will be unable to take a tooth of the ratchet wheel 21 and hence the travel of the mechanism carriage will be suspended. On the other hand, if the mechanism carriage be not travelling fast enough, the turning of the worm 9 causes the harness to move toward the right as viewed in Fig. 8), whereby .the harness shaft H pushes against the collar 42 and causes the bar 32 to be raised clear of the lill) arm 30, thus permitting the dog 20 to impart feed movement to the mechanism carriage.

It will be apparent that the present invention obviates the necessity of manually adjusting the feed of the mechanism carriage to the sley of the reeds or harnesses through which warps are to be drawn.

The present embodiment of the invention is especially 'designed for application to ex isting warp-drawing machines, the parts of the controlling mechanism being so constructed that they may be readily attached to existing machines.

I claim as my invention:

l. A Warp-drawing' machine having, in combination, a drive shaft, a crank on said shaft, a pivoted arm, a connecting rod yieldably connecting the crank to said arm, a ratchet wheel pivoted on the axis of said arm, a pawl on said arm arranged to engage the ratchet wheel, a mechanism carriage, means driven by said ratchet wheel for feeding the carriage, operating mechanism on said carriage, means for movably supporting a series of elements for the engagement of successive elements by said operating mechanism, said series of elements being free to travel with ksaid carriage, an arm rigid with the first mentioned arm, a bar mounted for vertical movement, the lower end of said bar when lowered being arranged to limit the oscillation of said arms, counter-balancing means acting upon said bar, a bell crank lever to which the upper end' of the bar is connected, and means rendering said hell crank lever sensitive to movement of said series of elements as a whole. Y

2. A warp-drawing machine having, in combination, a drive shaft, a crank on said shaft, a pivoted arm, a connecting ro'd yieldably connecting the crank to said arm, a ratchet wheel pivoted on the axis of said arm, a pawl on said arm arranged to engage the ratchet Wheel, a mechanism carriage, means driven by said ratchet wheel for feeding the carriage, operating mechanism on said carriage, means for movably supporting a loom harness for engagement by said operating mechanism, said harness being free to Atravel with said carriage, an arm rigid with the first mentioned arm, a bar mounted for vertical movement, thea Vlower end of said bar when lowered being arranged torliinit the oscillation of said arms, counter-balancing means acting upon said bar, a bell crank lever to whichl the upper end of the bar is connected, and means rendering said bell crank lever sensitive to movement of said harness as a whole.

In testimony whereof, I have hereunto afixed my signature.`

HOVARD D. COLMAN. 

